Lathing and plastering



W. J. GARVEY. Lathing and Plastering.

No. 226,056 Patented Mar, 30, 1880.

INVENTOR ATTORNEYS.

N. PETERS, PHqTo-UTMOGRAPKER, wA;mNGTON. n '0,

llNirn .TA'IES WALTER J. GARVEY, OF ST. LOUIS, MISSOURI.

LATHING AND PLASTERING.

SPECIFICATION forming part of Letters Patent No. 226,056, dated March 30, 1880.

Application filed February 9, 1880.

To all whom it may concern Be it known that I, WALTER J. GARVEY, of St. Louis, county of St. Louis, and State of Missouri, have invented a new and useful Improvement in Lathing and Plastering; and I do hereby declare that the following is a full,

clear, and exact description of the same.

The ordinary method of lathing and plastering the ceilings and interior walls of buildings consists, briefly stated, in nailing wooden laths to the joists or studs, then applying two separate coats of mortar, and, lastly, a white coat or finish, composed of slaked lime and plaster-of-paris, the latter being put in to give strength and solidity to the work. This method is objectionable for thefollowin g reasons: first, because of the time required for each coat to become dry before the succeeding one can be applied second, the liability ofthe mortar and plaster coats to crack and become detached; and, third, the inflammable character of the lath.

To obviate these defects walls and ceilings have been covered and protected by cement or plaster slabs stiffened with metal plates or rods.

Myinvention is an improvement in this line 5 and it consists in the construction and combination of parts, as hereinafter described and claimed.

The details of my invention are as hereinafter described, reference being bad to the accompanying drawings, in which- Figure 1 is a perspective view, showing my improved lath applied to joists to form the base ofa ceiling. Fig. 2 is a plan view of a portion of a ceiling with parts broken away. Fig. 3 is a crosssection on line w m, Fig. 2. Fig. 4 is a detail sectional view. Fig. 5 represents a modified form of core for the plasterlath.

A A indicate parallel wooden joists, and B plaster-and-wire laths, which are secured to the former by means of wires 0, looped over studs or nails a, fixed in the sides of the joists at a distance of about two inches above the laths. Each lath Bis ca-stin a mold, and preferably provided with tongue and groove on its respective side edges, so that the several laths may be locked together and thus form a firmer or more rigid ceiling or other wall-surface.

A wire, b, extends through the center of each lath B lengthwise, the same being placed and secured in the mold before the plaster is poured in, so thatit becomes firmly embedded in the same, and thus forms an integral permanent portion of the lath. The function of the wire I) is to impart tensile strength and greater rigidity. I prefer for some purposes to construct the core I) with one or more curves or arches, as shown in Fig. 5, to add to its function in these respects.

To secure the laths B to the joists A they are placed successively in position, and while so held the fastening-wires O are passed around their ends and looped over studs. A separate wire may be employed for each lath B but for ordinary purposes a continuous wire is sufr ficient, and it is obviously preferable for economy of time and labor.

So soon as the laths B have been thus applied and fastened the white plaster coat or finish 0 maybe at once applied directly on the plane roughened under surface of the same, and the Work is then complete.

I separate the contiguous ends of aligned laths by a narrow space, Fig. 2, which is afterward filled with plaster, d, flush with the under surface of the lath. The wire cores 1) of the several laths 13 project from the ends thereof, and hence become embedded in such plaster filling d, so that the latter serves as a means of connecting the several sets of laths firmly together.

The advantages of my construction of laths and mode of applying them are as follows They enable a wall to be speedily finished as respects lathing and plastering the same, since white coat or finish can be applied as soon as the laths are affixed, whereas by the old method three coats of mortar and plaster are required, and each of the two mortar coats must be allowed to dry before applying the following one, and hence, taking also into account the setting up and removal of scaffolding, the economy of time and laboris about one to four in favor of my invention. The lath is also stronger and not liable to crack and fall or become detached, even when soaked with water. It is likewise vermin-proof, and, having no combustible element, it offers acheap but quite effective barrier to the progress of fire from room to room.

In some localities I propose to use hydraulic cement instead of plaster to form the body of studs, of the fastening-wires, which are passed the lath.

What I claimis 1. A ceiling" or wall surfaee formed of the 5 plaster laths B, having wire cores projecting as shown, and the plaster filling d, which is applied between the adjacent but separated ends of the laths and surrounds the ends of the wires, as shown and described, for the purpose speci- IO fled.

2. The combination, with the laths B and around the laths and looped over the studs, as shown and described.

3. The combination, with the plaster laths, 15 of a wire core having one or more curves or arches, as shown and described.

- WALTER J. GARVEY.

Witnesses:

SoLoN O. KEMON, CHAS. A. PETTIT. 

